Preheat the broiler and position a rack 6 inches from the heat.,Toss the shrimp with 1 tablespoon of the olive oil and season with salt and pepper.,Broil the shrimp for 3 minutes, turning once, until opaque throughout.,In a mini food processor, pulse the mint with the warm water.,______,In a medium bowl, toss the beans with the mint oil and shrimp and season with salt and pepper.,In a large bowl, whisk the lemon juice with the remaining 1/2 tablespoon of olive oil.,Add the watercress, season with salt and pepper and toss gently.,Mound the watercress on large plates and spoon the shrimp salad on top.,Serve with lemon wedges.